I am, am I?

Other people seem to know me better than I know myself. Let me clarify: they know the person I am when I am around them better than I know my true inner core self. I don't know what I believe, what I have faith in, what I trust, what I feel. All of those are created in the moment to fit the person I am with. The hardest thing is that I am with my mother the most therefore I adjust myself to be her perfect baby angel. But am I? How can I say that isn't me if I don't actually know who I am? I want him to know the true me, not who I adapt to be around him. But, as I have said, how can I be me if I don't know who that is? I've spent so much of my life studying others; how they behave, how they think, how they interact. I'm a freaking anthropologist for goodness sake! But when it comes to myself I know nothing, I am empty. I am a large picture frame made of mirrors, containing a clear pane of glass over a blank sheet of college ruled paper torn from a generic spiral notebook.